| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Impact of mass concentration variations on plasma dynamics in a laser-ablated CH target |
| Hafiz Muhammad Siddique1,2, Guannan Zheng(郑冠男)1,2, Tao Tao(陶弢)1,2, Xiao-Bao Jia(贾晓宝)1,2, and Jian Zheng(郑坚)1,2,3,† |
1 Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, Hefei 230026, China;
2 Chinese Academy of Sciences (CAS) Key Laboratory of Frontier Physics in Controlled Nuclear Fusion, University of Science and Technology of China, Hefei 230026, China;
3 Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract Laser-produced plasmas in the field of inertial confinement fusion usually consist of multiple ion species with different atomic numbers and charge-to-mass ratios. With the presence of various plasma gradients, ion diffusion is driven, causing ion concentration to evolve and deviate from its initial value. In order to investigate the effect of ion diffusion on laser-produced plasmas, we implement an ion diffusion module within the radiation-hydro code MULTI-1D [Comput. Phys. Commun. 203 226 (2016)]. Under the planar target geometry and simulation parameters considered in this study, ion species separation primarily occurs near ablation front and underdense region. Although ion diffusion just has a slight impact on plasma hydrodynamics such as density, temperature and pressure profiles, it could have significant influence on the processes in relevant to ion-acoustic wave, whose damping rate depends sensitively on ion concentration. It is found that the coupling factor of cross-beam energy transfer (CBET) could change a lot when ion diffusion is taken into account, indicating that ion diffusion could play important role in laser fusion.
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Received: 09 March 2025
Revised: 29 April 2025
Accepted manuscript online: 26 May 2025
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PACS:
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52.57.-z
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(Laser inertial confinement)
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52.38.-r
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(Laser-plasma interactions)
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52.25.Dg
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(Plasma kinetic equations)
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52.30.Ex
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(Two-fluid and multi-fluid plasmas)
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| Fund: Project supported by the National Nature Science Foundation of China (Grant No. 12375242) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA25010200). |
Corresponding Authors:
Jian Zheng
E-mail: jzheng@ustc.edu.cn
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Cite this article:
Hafiz Muhammad Siddique, Guannan Zheng(郑冠男), Tao Tao(陶弢), Xiao-Bao Jia(贾晓宝), and Jian Zheng(郑坚) Impact of mass concentration variations on plasma dynamics in a laser-ablated CH target 2025 Chin. Phys. B 34 115203
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